如何减小Spring Boot Jar包体积？遇Thin Launcher报错求助

1. 解决spring-boot-thin-launcher报错 #

你遇到的ThrowingConsumer缺失问题，核心原因是spring-boot-thin-launcher 1.x版本不兼容Spring Boot 3.x。Spring Boot 3.x需要使用thin launcher的2.x适配版本，修改插件依赖版本即可：

<dependency>
    <groupId>org.springframework.boot.experimental</groupId>
    <artifactId>spring-boot-thin-launcher</artifactId>
    <version>2.0.1.RELEASE</version> <!-- 适配Spring Boot 3.x版本 -->
</dependency>

2. 大幅缩减Jar包体积（从500MB+降至几十MB） #

Jar包过大主要源于冗余依赖、AWS SDK版本混用及全量包引入，做以下关键修改：

移除不必要依赖 #

删除spring-boot-starter-thymeleaf：Lambda函数不需要Web模板引擎，该依赖会引入大量Web相关包，是体积膨胀的主要诱因。

清理AWS SDK依赖（避免1.x/2.x混用+全量包引入） #

你同时引入了AWS SDK 1.x（aws-java-sdk-ses）和2.x全量包（aws-sdk-java），导致依赖重复、体积暴增。正确做法：

1. 使用AWS SDK 2.x的BOM统一版本，避免版本冲突
2. 仅引入实际需要的单个SDK模块（而非全量包）

修改后的AWS依赖配置：

<properties>
    <aws.sdk.version>2.20.120</aws.sdk.version> <!-- 统一SDK版本 -->
</properties>

<dependencyManagement>
    <dependencies>
        <!-- AWS SDK 2.x BOM，统一管理所有SDK模块版本 -->
        <dependency>
            <groupId>software.amazon.awssdk</groupId>
            <artifactId>bom</artifactId>
            <version>${aws.sdk.version}</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

<dependencies>
    <!-- 仅引入需要的SES模块（SDK 2.x） -->
    <dependency>
        <groupId>software.amazon.awssdk</groupId>
        <artifactId>ses</artifactId>
    </dependency>
    <!-- Lambda Log4j2适配 -->
    <dependency>
        <groupId>com.amazonaws</groupId>
        <artifactId>aws-lambda-java-log4j2</artifactId>
        <version>1.5.1</version>
    </dependency>
    <!-- Spring Boot Lambda适配（简化Lambda入口编写） -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-aws-lambda</artifactId>
    </dependency>
</dependencies>

优化打包配置 #

启用Spring Boot分层打包，进一步提升Lambda部署效率：

<plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
    <configuration>
        <layers>
            <enabled>true</enabled>
        </layers>
    </configuration>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot.experimental</groupId>
            <artifactId>spring-boot-thin-launcher</artifactId>
            <version>2.0.1.RELEASE</version>
        </dependency>
    </dependencies>
</plugin>

3. 完整修改后的pom.xml #

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.1.2</version>
        <relativePath/>
    </parent>
    <groupId>au.com.agrifhm</groupId>
    <artifactId>abcd</artifactId>
    <version>1.0</version>
    <name>abcd</name>
    <description>abcd</description>

    <properties>
        <maven.compiler.source>17</maven.compiler.source> <!-- Spring Boot 3.x要求JDK 17+ -->
        <maven.compiler.target>17</maven.compiler.target>
        <aws.sdk.version>2.20.120</aws.sdk.version>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>software.amazon.awssdk</groupId>
                <artifactId>bom</artifactId>
                <version>${aws.sdk.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <!-- Spring Boot Lambda适配 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aws-lambda</artifactId>
        </dependency>
        <!-- AWS SES SDK 2.x -->
        <dependency>
            <groupId>software.amazon.awssdk</groupId>
            <artifactId>ses</artifactId>
        </dependency>
        <!-- Lambda Log4j2适配 -->
        <dependency>
            <groupId>com.amazonaws</groupId>
            <artifactId>aws-lambda-java-log4j2</artifactId>
            <version>1.5.1</version>
        </dependency>
        <!-- 测试依赖 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!-- Lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <layers>
                        <enabled>true</enabled>
                    </layers>
                </configuration>
                <dependencies>
                    <dependency>
                        <groupId>org.springframework.boot.experimental</groupId>
                        <artifactId>spring-boot-thin-launcher</artifactId>
                        <version>2.0.1.RELEASE</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
    </build>
</project>

额外注意事项 #

• Spring Boot 3.x要求JDK 17+，确保编译环境符合要求
• 若需离线打包thin launcher，可在插件配置中添加<thin.archive>true</thin.archive>
• 部署Lambda时，还可尝试Spring Native编译成镜像，进一步缩减体积和启动时间

内容的提问来源于stack exchange，提问作者Sandeep Kumar